[clang] [clang][test] Add test for comma operator rejection in preprocessor conditionals (PR #155570)

[NohHyeon Kwon via cfe-commits]

swote-git wrote:

@DavidSpickett @Endilll i made changes for adding context(cwg3017) and adding tests(`#elif` , `#if ,`).

Please review when you have time.

https://github.com/llvm/llvm-project/pull/155570